ANSWER 1
Birds can fly because they have adapted to their environment in order to survive. Some adaptations a bird has made are: hollow bones, thin legs,a light beak, and strong flying muscles that humans don't have.
Us, we are too heavy for our strength, or too weak for our weight to be able to fly.
Answer 2
With regard to flying, birds have many advantages over humans:
Answer 3
A bird's heart beats up to 420 times per minute but a human's heart beats only 72 times on an average. So our heart cannot produce sufficient energy required to make us fly.
Answer 4
It's mainly about strength-to-weight ratio. When living things get bigger, they get heavier faster than they get stronger. A muscle that's twice as strong is four times as heavy, and will need four times the blood flow, oxygen and nutrients to be as effective as the smaller muscle. Something human-sized that's built as a human just can't get the required strength-to-weight ratio - even if we would make us some really slick wings.
Answer 5
We don't live in a cartoon or Anime where such thing are made possible.
because God made us humans most people prefer that we are not animals but we are technically but for animals without Wings??
we cant
oxygen...we cant live without it
No, humans cannot live without stem cells. Stem cells are crucial for the growth, repair, and maintenance of tissues in the body. They play a vital role in replenishing cells and tissues continuously throughout life.
One of the living things is trees. Without trees we can not breathe.
Yes, in fact women and men who suffer from cancers/diseases of the uterus and male sex organs, will often have a hysterectomy or vasectomy respectively, to remove the organs. You will live, just be unable to have children of your own (especially if you have had a hysterectomy).
no they cant calcium is what keeps are bones strong
We cant live without technology because it powers our life support machines and helps us discover new things
Well the things that humans do need are water/food safety shelter that's all what we really need.
yes. no.
Because a man cant live without a woman the water cant exist with out the fir and everything has to depend on something else there isn't a logical explanation. That's just how the world is!
A long time ago, people did live without machines. But now, it would make things much harder to do so.
NO becuz u cant really live in the bottom of the ocean bcuz humans can not breath in water without choking and dying! so NO
i cant live without you
# # #
i cant live without u
Yes humans can live with out heads if they are an zombie.
It is not that people cannot live without relations. Humans are social animals in nature and we tend to be cordial with people whom we associate our behaviors with, or to those we are attracted to, in case of sexual attraction.